drivers/edac/edac_mc_sysfs.c

   1 /*
   2  * edac_mc kernel module
   3  * (C) 2005, 2006 Linux Networx (http://lnxi.com)
   4  * This file may be distributed under the terms of the
   5  * GNU General Public License.
   6  *
   7  * Written Doug Thompson <norsk5@xmission.com>
   8  *
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/sysdev.h>
  13 #include <linux/ctype.h>
  14
  15 #include "edac_core.h"
  16 #include "edac_module.h"
  17
  18 /* MC EDAC Controls, setable by module parameter, and sysfs */
  19 static int log_ue = 1;
  20 static int log_ce = 1;
  21 static int panic_on_ue;
  22 static int poll_msec = 1000;
  23
  24 /* Getter functions for above */
  25 int edac_get_log_ue(void)
  26 {
  27         return log_ue;
  28 }
  29
  30 int edac_get_log_ce(void)
  31 {
  32         return log_ce;
  33 }
  34
  35 int edac_get_panic_on_ue(void)
  36 {
  37         return panic_on_ue;
  38 }
  39
  40 /* this is temporary */
  41 int edac_mc_get_poll_msec(void)
  42 {
  43         return edac_get_poll_msec();
  44 }
  45
  46 int edac_get_poll_msec(void)
  47 {
  48         return poll_msec;
  49 }
  50
  51 /* Parameter declarations for above */
  52 module_param(panic_on_ue, int, 0644);
  53 MODULE_PARM_DESC(panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
  54 module_param(log_ue, int, 0644);
  55 MODULE_PARM_DESC(log_ue, "Log uncorrectable error to console: 0=off 1=on");
  56 module_param(log_ce, int, 0644);
  57 MODULE_PARM_DESC(log_ce, "Log correctable error to console: 0=off 1=on");
  58 module_param(poll_msec, int, 0644);
  59 MODULE_PARM_DESC(poll_msec, "Polling period in milliseconds");
  60
  61
  62 /*
  63  * various constants for Memory Controllers
  64  */
  65 static const char *mem_types[] = {
  66         [MEM_EMPTY] = "Empty",
  67         [MEM_RESERVED] = "Reserved",
  68         [MEM_UNKNOWN] = "Unknown",
  69         [MEM_FPM] = "FPM",
  70         [MEM_EDO] = "EDO",
  71         [MEM_BEDO] = "BEDO",
  72         [MEM_SDR] = "Unbuffered-SDR",
  73         [MEM_RDR] = "Registered-SDR",
  74         [MEM_DDR] = "Unbuffered-DDR",
  75         [MEM_RDDR] = "Registered-DDR",
  76         [MEM_RMBS] = "RMBS",
  77         [MEM_DDR2] = "Unbuffered-DDR2",
  78         [MEM_FB_DDR2] = "FullyBuffered-DDR2",
  79         [MEM_RDDR2] = "Registered-DDR2"
  80 };
  81
  82 static const char *dev_types[] = {
  83         [DEV_UNKNOWN] = "Unknown",
  84         [DEV_X1] = "x1",
  85         [DEV_X2] = "x2",
  86         [DEV_X4] = "x4",
  87         [DEV_X8] = "x8",
  88         [DEV_X16] = "x16",
  89         [DEV_X32] = "x32",
  90         [DEV_X64] = "x64"
  91 };
  92
  93 static const char *edac_caps[] = {
  94         [EDAC_UNKNOWN] = "Unknown",
  95         [EDAC_NONE] = "None",
  96         [EDAC_RESERVED] = "Reserved",
  97         [EDAC_PARITY] = "PARITY",
  98         [EDAC_EC] = "EC",
  99         [EDAC_SECDED] = "SECDED",
 100         [EDAC_S2ECD2ED] = "S2ECD2ED",
 101         [EDAC_S4ECD4ED] = "S4ECD4ED",
 102         [EDAC_S8ECD8ED] = "S8ECD8ED",
 103         [EDAC_S16ECD16ED] = "S16ECD16ED"
 104 };
 105
 106 /* sysfs object:
 107  *      /sys/devices/system/edac/mc
 108  */
 109 static struct kobject edac_memctrl_kobj;
 110
 111 /* We use these to wait for the reference counts on edac_memctrl_kobj and
 112  * edac_pci_kobj to reach 0.
 113  */
 114 static struct completion edac_memctrl_kobj_complete;
 115
 116 /*
 117  * /sys/devices/system/edac/mc;
 118  *      data structures and methods
 119  */
 120 static ssize_t memctrl_int_show(void *ptr, char *buffer)
 121 {
 122         int *value = (int*) ptr;
 123         return sprintf(buffer, "%u\n", *value);
 124 }
 125
 126 static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
 127 {
 128         int *value = (int*) ptr;
 129
 130         if (isdigit(*buffer))
 131                 *value = simple_strtoul(buffer, NULL, 0);
 132
 133         return count;
 134 }
 135
 136 struct memctrl_dev_attribute {
 137         struct attribute attr;
 138         void *value;
 139         ssize_t (*show)(void *,char *);
 140         ssize_t (*store)(void *, const char *, size_t);
 141 };
 142
 143 /* Set of show/store abstract level functions for memory control object */
 144 static ssize_t memctrl_dev_show(struct kobject *kobj,
 145                 struct attribute *attr, char *buffer)
 146 {
 147         struct memctrl_dev_attribute *memctrl_dev;
 148         memctrl_dev = (struct memctrl_dev_attribute*)attr;
 149
 150         if (memctrl_dev->show)
 151                 return memctrl_dev->show(memctrl_dev->value, buffer);
 152
 153         return -EIO;
 154 }
 155
 156 static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
 157                 const char *buffer, size_t count)
 158 {
 159         struct memctrl_dev_attribute *memctrl_dev;
 160         memctrl_dev = (struct memctrl_dev_attribute*)attr;
 161
 162         if (memctrl_dev->store)
 163                 return memctrl_dev->store(memctrl_dev->value, buffer, count);
 164
 165         return -EIO;
 166 }
 167
 168 static struct sysfs_ops memctrlfs_ops = {
 169         .show   = memctrl_dev_show,
 170         .store  = memctrl_dev_store
 171 };
 172
 173 #define MEMCTRL_ATTR(_name,_mode,_show,_store)                  \
 174 static struct memctrl_dev_attribute attr_##_name = {                    \
 175         .attr = {.name = __stringify(_name), .mode = _mode },   \
 176         .value  = &_name,                                       \
 177         .show   = _show,                                        \
 178         .store  = _store,                                       \
 179 };
 180
 181 #define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store)     \
 182 static struct memctrl_dev_attribute attr_##_name = {                    \
 183         .attr = {.name = __stringify(_name), .mode = _mode },   \
 184         .value  = _data,                                        \
 185         .show   = _show,                                        \
 186         .store  = _store,                                       \
 187 };
 188
 189 /* csrow<id> control files */
 190 MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
 191 MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
 192 MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
 193 MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
 194
 195 /* Base Attributes of the memory ECC object */
 196 static struct memctrl_dev_attribute *memctrl_attr[] = {
 197         &attr_panic_on_ue,
 198         &attr_log_ue,
 199         &attr_log_ce,
 200         &attr_poll_msec,
 201         NULL,
 202 };
 203
 204 /* Main MC kobject release() function */
 205 static void edac_memctrl_master_release(struct kobject *kobj)
 206 {
 207         debugf1("%s()\n", __func__);
 208         complete(&edac_memctrl_kobj_complete);
 209 }
 210
 211 static struct kobj_type ktype_memctrl = {
 212         .release = edac_memctrl_master_release,
 213         .sysfs_ops = &memctrlfs_ops,
 214         .default_attrs = (struct attribute **) memctrl_attr,
 215 };
 216
 217 /* Initialize the main sysfs entries for edac:
 218  *   /sys/devices/system/edac
 219  *
 220  * and children
 221  *
 222  * Return:  0 SUCCESS
 223  *         !0 FAILURE
 224  */
 225 int edac_sysfs_memctrl_setup(void)
 226 {
 227         int err = 0;
 228         struct sysdev_class *edac_class;
 229
 230         debugf1("%s()\n", __func__);
 231
 232         /* get the /sys/devices/system/edac class reference */
 233         edac_class = edac_get_edac_class();
 234         if (edac_class == NULL) {
 235                 debugf1("%s() no edac_class error=%d\n", __func__, err);
 236                 return err;
 237         }
 238
 239         /* Init the MC's kobject */
 240         memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj));
 241         edac_memctrl_kobj.parent = &edac_class->kset.kobj;
 242         edac_memctrl_kobj.ktype = &ktype_memctrl;
 243
 244         /* generate sysfs "..../edac/mc"   */
 245         err = kobject_set_name(&edac_memctrl_kobj,"mc");
 246         if (err) {
 247                 debugf1("%s() Failed to set name '.../edac/mc'\n", __func__ );
 248                 return err;
 249         }
 250
 251         /* FIXME: maybe new sysdev_create_subdir() */
 252         err = kobject_register(&edac_memctrl_kobj);
 253         if (err) {
 254                 debugf1("%s() Failed to register '.../edac/mc'\n", __func__ );
 255                 return err;
 256         }
 257
 258         debugf1("%s() Registered '.../edac/mc' kobject\n",__func__);
 259         return 0;
 260 }
 261
 262 /*
 263  * MC teardown:
 264  *      the '..../edac/mc' kobject followed by '..../edac' itself
 265  */
 266 void edac_sysfs_memctrl_teardown(void)
 267 {
 268         debugf0("MC: " __FILE__ ": %s()\n", __func__);
 269
 270         /* Unregister the MC's kobject and wait for reference count to reach 0.
 271          */
 272         init_completion(&edac_memctrl_kobj_complete);
 273         kobject_unregister(&edac_memctrl_kobj);
 274         wait_for_completion(&edac_memctrl_kobj_complete);
 275 }
 276
 277
 278 /* EDAC sysfs CSROW data structures and methods
 279  */
 280
 281 /* Set of more default csrow<id> attribute show/store functions */
 282 static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
 283                         int private)
 284 {
 285         return sprintf(data,"%u\n", csrow->ue_count);
 286 }
 287
 288 static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
 289                         int private)
 290 {
 291         return sprintf(data,"%u\n", csrow->ce_count);
 292 }
 293
 294 static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
 295                         int private)
 296 {
 297         return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
 298 }
 299
 300 static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
 301                         int private)
 302 {
 303         return sprintf(data,"%s\n", mem_types[csrow->mtype]);
 304 }
 305
 306 static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
 307                         int private)
 308 {
 309         return sprintf(data,"%s\n", dev_types[csrow->dtype]);
 310 }
 311
 312 static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
 313                         int private)
 314 {
 315         return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
 316 }
 317
 318 /* show/store functions for DIMM Label attributes */
 319 static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
 320                 char *data, int channel)
 321 {
 322         return snprintf(data, EDAC_MC_LABEL_LEN,"%s",
 323                         csrow->channels[channel].label);
 324 }
 325
 326 static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
 327                                 const char *data,
 328                                 size_t count,
 329                                 int channel)
 330 {
 331         ssize_t max_size = 0;
 332
 333         max_size = min((ssize_t)count,(ssize_t)EDAC_MC_LABEL_LEN-1);
 334         strncpy(csrow->channels[channel].label, data, max_size);
 335         csrow->channels[channel].label[max_size] = '\0';
 336
 337         return max_size;
 338 }
 339
 340 /* show function for dynamic chX_ce_count attribute */
 341 static ssize_t channel_ce_count_show(struct csrow_info *csrow,
 342                                 char *data,
 343                                 int channel)
 344 {
 345         return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
 346 }
 347
 348 /* csrow specific attribute structure */
 349 struct csrowdev_attribute {
 350         struct attribute attr;
 351         ssize_t (*show)(struct csrow_info *,char *,int);
 352         ssize_t (*store)(struct csrow_info *, const char *,size_t,int);
 353         int    private;
 354 };
 355
 356 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
 357 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
 358
 359 /* Set of show/store higher level functions for default csrow attributes */
 360 static ssize_t csrowdev_show(struct kobject *kobj,
 361                         struct attribute *attr,
 362                         char *buffer)
 363 {
 364         struct csrow_info *csrow = to_csrow(kobj);
 365         struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
 366
 367         if (csrowdev_attr->show)
 368                 return csrowdev_attr->show(csrow,
 369                                         buffer,
 370                                         csrowdev_attr->private);
 371         return -EIO;
 372 }
 373
 374 static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
 375                 const char *buffer, size_t count)
 376 {
 377         struct csrow_info *csrow = to_csrow(kobj);
 378         struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr);
 379
 380         if (csrowdev_attr->store)
 381                 return csrowdev_attr->store(csrow,
 382                                         buffer,
 383                                         count,
 384                                         csrowdev_attr->private);
 385         return -EIO;
 386 }
 387
 388 static struct sysfs_ops csrowfs_ops = {
 389         .show   = csrowdev_show,
 390         .store  = csrowdev_store
 391 };
 392
 393 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private)        \
 394 static struct csrowdev_attribute attr_##_name = {                       \
 395         .attr = {.name = __stringify(_name), .mode = _mode },   \
 396         .show   = _show,                                        \
 397         .store  = _store,                                       \
 398         .private = _private,                                    \
 399 };
 400
 401 /* default cwrow<id>/attribute files */
 402 CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL,0);
 403 CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL,0);
 404 CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL,0);
 405 CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL,0);
 406 CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL,0);
 407 CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL,0);
 408
 409 /* default attributes of the CSROW<id> object */
 410 static struct csrowdev_attribute *default_csrow_attr[] = {
 411         &attr_dev_type,
 412         &attr_mem_type,
 413         &attr_edac_mode,
 414         &attr_size_mb,
 415         &attr_ue_count,
 416         &attr_ce_count,
 417         NULL,
 418 };
 419
 420
 421 /* possible dynamic channel DIMM Label attribute files */
 422 CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR,
 423                 channel_dimm_label_show,
 424                 channel_dimm_label_store,
 425                 0 );
 426 CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR,
 427                 channel_dimm_label_show,
 428                 channel_dimm_label_store,
 429                 1 );
 430 CSROWDEV_ATTR(ch2_dimm_label,S_IRUGO|S_IWUSR,
 431                 channel_dimm_label_show,
 432                 channel_dimm_label_store,
 433                 2 );
 434 CSROWDEV_ATTR(ch3_dimm_label,S_IRUGO|S_IWUSR,
 435                 channel_dimm_label_show,
 436                 channel_dimm_label_store,
 437                 3 );
 438 CSROWDEV_ATTR(ch4_dimm_label,S_IRUGO|S_IWUSR,
 439                 channel_dimm_label_show,
 440                 channel_dimm_label_store,
 441                 4 );
 442 CSROWDEV_ATTR(ch5_dimm_label,S_IRUGO|S_IWUSR,
 443                 channel_dimm_label_show,
 444                 channel_dimm_label_store,
 445                 5 );
 446
 447 /* Total possible dynamic DIMM Label attribute file table */
 448 static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
 449                 &attr_ch0_dimm_label,
 450                 &attr_ch1_dimm_label,
 451                 &attr_ch2_dimm_label,
 452                 &attr_ch3_dimm_label,
 453                 &attr_ch4_dimm_label,
 454                 &attr_ch5_dimm_label
 455 };
 456
 457 /* possible dynamic channel ce_count attribute files */
 458 CSROWDEV_ATTR(ch0_ce_count,S_IRUGO|S_IWUSR,
 459                 channel_ce_count_show,
 460                 NULL,
 461                 0 );
 462 CSROWDEV_ATTR(ch1_ce_count,S_IRUGO|S_IWUSR,
 463                 channel_ce_count_show,
 464                 NULL,
 465                 1 );
 466 CSROWDEV_ATTR(ch2_ce_count,S_IRUGO|S_IWUSR,
 467                 channel_ce_count_show,
 468                 NULL,
 469                 2 );
 470 CSROWDEV_ATTR(ch3_ce_count,S_IRUGO|S_IWUSR,
 471                 channel_ce_count_show,
 472                 NULL,
 473                 3 );
 474 CSROWDEV_ATTR(ch4_ce_count,S_IRUGO|S_IWUSR,
 475                 channel_ce_count_show,
 476                 NULL,
 477                 4 );
 478 CSROWDEV_ATTR(ch5_ce_count,S_IRUGO|S_IWUSR,
 479                 channel_ce_count_show,
 480                 NULL,
 481                 5 );
 482
 483 /* Total possible dynamic ce_count attribute file table */
 484 static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
 485                 &attr_ch0_ce_count,
 486                 &attr_ch1_ce_count,
 487                 &attr_ch2_ce_count,
 488                 &attr_ch3_ce_count,
 489                 &attr_ch4_ce_count,
 490                 &attr_ch5_ce_count
 491 };
 492
 493
 494 #define EDAC_NR_CHANNELS        6
 495
 496 /* Create dynamic CHANNEL files, indexed by 'chan',  under specifed CSROW */
 497 static int edac_create_channel_files(struct kobject *kobj, int chan)
 498 {
 499         int err=-ENODEV;
 500
 501         if (chan >= EDAC_NR_CHANNELS)
 502                 return err;
 503
 504         /* create the DIMM label attribute file */
 505         err = sysfs_create_file(kobj,
 506                         (struct attribute *) dynamic_csrow_dimm_attr[chan]);
 507
 508         if (!err) {
 509                 /* create the CE Count attribute file */
 510                 err = sysfs_create_file(kobj,
 511                         (struct attribute *)dynamic_csrow_ce_count_attr[chan]);
 512         } else {
 513                 debugf1("%s()  dimm labels and ce_count files created",
 514                         __func__);
 515         }
 516
 517         return err;
 518 }
 519
 520 /* No memory to release for this kobj */
 521 static void edac_csrow_instance_release(struct kobject *kobj)
 522 {
 523         struct csrow_info *cs;
 524
 525         cs = container_of(kobj, struct csrow_info, kobj);
 526         complete(&cs->kobj_complete);
 527 }
 528
 529 /* the kobj_type instance for a CSROW */
 530 static struct kobj_type ktype_csrow = {
 531         .release = edac_csrow_instance_release,
 532         .sysfs_ops = &csrowfs_ops,
 533         .default_attrs = (struct attribute **) default_csrow_attr,
 534 };
 535
 536 /* Create a CSROW object under specifed edac_mc_device */
 537 static int edac_create_csrow_object(
 538                 struct kobject *edac_mci_kobj,
 539                 struct csrow_info *csrow,
 540                 int index)
 541 {
 542         int err = 0;
 543         int chan;
 544
 545         memset(&csrow->kobj, 0, sizeof(csrow->kobj));
 546
 547         /* generate ..../edac/mc/mc<id>/csrow<index>   */
 548
 549         csrow->kobj.parent = edac_mci_kobj;
 550         csrow->kobj.ktype = &ktype_csrow;
 551
 552         /* name this instance of csrow<id> */
 553         err = kobject_set_name(&csrow->kobj,"csrow%d",index);
 554         if (err)
 555                 goto error_exit;
 556
 557         /* Instanstiate the csrow object */
 558         err = kobject_register(&csrow->kobj);
 559         if (!err) {
 560                 /* Create the dyanmic attribute files on this csrow,
 561                  * namely, the DIMM labels and the channel ce_count
 562                  */
 563                 for (chan = 0; chan < csrow->nr_channels; chan++) {
 564                         err = edac_create_channel_files(&csrow->kobj,chan);
 565                         if (err)
 566                                 break;
 567                 }
 568         }
 569
 570 error_exit:
 571         return err;
 572 }
 573
 574 /* default sysfs methods and data structures for the main MCI kobject */
 575
 576 static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
 577                 const char *data, size_t count)
 578 {
 579         int row, chan;
 580
 581         mci->ue_noinfo_count = 0;
 582         mci->ce_noinfo_count = 0;
 583         mci->ue_count = 0;
 584         mci->ce_count = 0;
 585
 586         for (row = 0; row < mci->nr_csrows; row++) {
 587                 struct csrow_info *ri = &mci->csrows[row];
 588
 589                 ri->ue_count = 0;
 590                 ri->ce_count = 0;
 591
 592                 for (chan = 0; chan < ri->nr_channels; chan++)
 593                         ri->channels[chan].ce_count = 0;
 594         }
 595
 596         mci->start_time = jiffies;
 597         return count;
 598 }
 599
 600 /* memory scrubbing */
 601 static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
 602                                         const char *data, size_t count)
 603 {
 604         u32 bandwidth = -1;
 605
 606         if (mci->set_sdram_scrub_rate) {
 607
 608                 memctrl_int_store(&bandwidth, data, count);
 609
 610                 if (!(*mci->set_sdram_scrub_rate)(mci, &bandwidth)) {
 611                         edac_printk(KERN_DEBUG, EDAC_MC,
 612                                 "Scrub rate set successfully, applied: %d\n",
 613                                 bandwidth);
 614                 } else {
 615                         /* FIXME: error codes maybe? */
 616                         edac_printk(KERN_DEBUG, EDAC_MC,
 617                                 "Scrub rate set FAILED, could not apply: %d\n",
 618                                 bandwidth);
 619                 }
 620         } else {
 621                 /* FIXME: produce "not implemented" ERROR for user-side. */
 622                 edac_printk(KERN_WARNING, EDAC_MC,
 623                         "Memory scrubbing 'set'control is not implemented!\n");
 624         }
 625         return count;
 626 }
 627
 628 static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
 629 {
 630         u32 bandwidth = -1;
 631
 632         if (mci->get_sdram_scrub_rate) {
 633                 if (!(*mci->get_sdram_scrub_rate)(mci, &bandwidth)) {
 634                         edac_printk(KERN_DEBUG, EDAC_MC,
 635                                 "Scrub rate successfully, fetched: %d\n",
 636                                 bandwidth);
 637                 } else {
 638                         /* FIXME: error codes maybe? */
 639                         edac_printk(KERN_DEBUG, EDAC_MC,
 640                                 "Scrub rate fetch FAILED, got: %d\n",
 641                                 bandwidth);
 642                 }
 643         } else {
 644                 /* FIXME: produce "not implemented" ERROR for user-side.  */
 645                 edac_printk(KERN_WARNING, EDAC_MC,
 646                         "Memory scrubbing 'get' control is not implemented\n");
 647         }
 648         return sprintf(data, "%d\n", bandwidth);
 649 }
 650
 651 /* default attribute files for the MCI object */
 652 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
 653 {
 654         return sprintf(data,"%d\n", mci->ue_count);
 655 }
 656
 657 static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
 658 {
 659         return sprintf(data,"%d\n", mci->ce_count);
 660 }
 661
 662 static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
 663 {
 664         return sprintf(data,"%d\n", mci->ce_noinfo_count);
 665 }
 666
 667 static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
 668 {
 669         return sprintf(data,"%d\n", mci->ue_noinfo_count);
 670 }
 671
 672 static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
 673 {
 674         return sprintf(data,"%ld\n", (jiffies - mci->start_time) / HZ);
 675 }
 676
 677 static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
 678 {
 679         return sprintf(data,"%s\n", mci->ctl_name);
 680 }
 681
 682 static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
 683 {
 684         int total_pages, csrow_idx;
 685
 686         for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
 687                         csrow_idx++) {
 688                 struct csrow_info *csrow = &mci->csrows[csrow_idx];
 689
 690                 if (!csrow->nr_pages)
 691                         continue;
 692
 693                 total_pages += csrow->nr_pages;
 694         }
 695
 696         return sprintf(data,"%u\n", PAGES_TO_MiB(total_pages));
 697 }
 698
 699 struct mcidev_attribute {
 700         struct attribute attr;
 701         ssize_t (*show)(struct mem_ctl_info *,char *);
 702         ssize_t (*store)(struct mem_ctl_info *, const char *,size_t);
 703 };
 704
 705 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
 706 #define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr)
 707
 708 /* MCI show/store functions for top most object */
 709 static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
 710                 char *buffer)
 711 {
 712         struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
 713         struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr);
 714
 715         if (mcidev_attr->show)
 716                 return mcidev_attr->show(mem_ctl_info, buffer);
 717
 718         return -EIO;
 719 }
 720
 721 static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
 722                 const char *buffer, size_t count)
 723 {
 724         struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
 725         struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr);
 726
 727         if (mcidev_attr->store)
 728                 return mcidev_attr->store(mem_ctl_info, buffer, count);
 729
 730         return -EIO;
 731 }
 732
 733 static struct sysfs_ops mci_ops = {
 734         .show = mcidev_show,
 735         .store = mcidev_store
 736 };
 737
 738 #define MCIDEV_ATTR(_name,_mode,_show,_store)                   \
 739 static struct mcidev_attribute mci_attr_##_name = {                     \
 740         .attr = {.name = __stringify(_name), .mode = _mode },   \
 741         .show   = _show,                                        \
 742         .store  = _store,                                       \
 743 };
 744
 745 /* default Control file */
 746 MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store);
 747
 748 /* default Attribute files */
 749 MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL);
 750 MCIDEV_ATTR(size_mb,S_IRUGO,mci_size_mb_show,NULL);
 751 MCIDEV_ATTR(seconds_since_reset,S_IRUGO,mci_seconds_show,NULL);
 752 MCIDEV_ATTR(ue_noinfo_count,S_IRUGO,mci_ue_noinfo_show,NULL);
 753 MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL);
 754 MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL);
 755 MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL);
 756
 757 /* memory scrubber attribute file */
 758 MCIDEV_ATTR(sdram_scrub_rate,S_IRUGO|S_IWUSR,mci_sdram_scrub_rate_show,\
 759                         mci_sdram_scrub_rate_store);
 760
 761 static struct mcidev_attribute *mci_attr[] = {
 762         &mci_attr_reset_counters,
 763         &mci_attr_mc_name,
 764         &mci_attr_size_mb,
 765         &mci_attr_seconds_since_reset,
 766         &mci_attr_ue_noinfo_count,
 767         &mci_attr_ce_noinfo_count,
 768         &mci_attr_ue_count,
 769         &mci_attr_ce_count,
 770         &mci_attr_sdram_scrub_rate,
 771         NULL
 772 };
 773
 774 /*
 775  * Release of a MC controlling instance
 776  */
 777 static void edac_mci_instance_release(struct kobject *kobj)
 778 {
 779         struct mem_ctl_info *mci;
 780
 781         mci = to_mci(kobj);
 782         debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
 783         complete(&mci->kobj_complete);
 784 }
 785
 786 static struct kobj_type ktype_mci = {
 787         .release = edac_mci_instance_release,
 788         .sysfs_ops = &mci_ops,
 789         .default_attrs = (struct attribute **) mci_attr,
 790 };
 791
 792
 793 #define EDAC_DEVICE_SYMLINK     "device"
 794
 795 /*
 796  * Create a new Memory Controller kobject instance,
 797  *      mc<id> under the 'mc' directory
 798  *
 799  * Return:
 800  *      0       Success
 801  *      !0      Failure
 802  */
 803 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
 804 {
 805         int i;
 806         int err;
 807         struct csrow_info *csrow;
 808         struct kobject *edac_mci_kobj=&mci->edac_mci_kobj;
 809
 810         debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
 811         memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj));
 812
 813         /* set the name of the mc<id> object */
 814         err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx);
 815         if (err)
 816                 return err;
 817
 818         /* link to our parent the '..../edac/mc' object */
 819         edac_mci_kobj->parent = &edac_memctrl_kobj;
 820         edac_mci_kobj->ktype = &ktype_mci;
 821
 822         /* register the mc<id> kobject */
 823         err = kobject_register(edac_mci_kobj);
 824         if (err)
 825                 return err;
 826
 827         /* create a symlink for the device */
 828         err = sysfs_create_link(edac_mci_kobj, &mci->dev->kobj,
 829                                 EDAC_DEVICE_SYMLINK);
 830         if (err)
 831                 goto fail0;
 832
 833         /* Make directories for each CSROW object
 834          * under the mc<id> kobject
 835          */
 836         for (i = 0; i < mci->nr_csrows; i++) {
 837                 csrow = &mci->csrows[i];
 838
 839                 /* Only expose populated CSROWs */
 840                 if (csrow->nr_pages > 0) {
 841                         err = edac_create_csrow_object(edac_mci_kobj,csrow,i);
 842                         if (err)
 843                                 goto fail1;
 844                 }
 845         }
 846
 847         return 0;
 848
 849         /* CSROW error: backout what has already been registered,  */
 850 fail1:
 851         for ( i--; i >= 0; i--) {
 852                 if (csrow->nr_pages > 0) {
 853                         init_completion(&csrow->kobj_complete);
 854                         kobject_unregister(&mci->csrows[i].kobj);
 855                         wait_for_completion(&csrow->kobj_complete);
 856                 }
 857         }
 858
 859 fail0:
 860         init_completion(&mci->kobj_complete);
 861         kobject_unregister(edac_mci_kobj);
 862         wait_for_completion(&mci->kobj_complete);
 863         return err;
 864 }
 865
 866 /*
 867  * remove a Memory Controller instance
 868  */
 869 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
 870 {
 871         int i;
 872
 873         debugf0("%s()\n", __func__);
 874
 875         /* remove all csrow kobjects */
 876         for (i = 0; i < mci->nr_csrows; i++) {
 877                 if (mci->csrows[i].nr_pages > 0) {
 878                         init_completion(&mci->csrows[i].kobj_complete);
 879                         kobject_unregister(&mci->csrows[i].kobj);
 880                         wait_for_completion(&mci->csrows[i].kobj_complete);
 881                 }
 882         }
 883
 884         sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
 885         init_completion(&mci->kobj_complete);
 886         kobject_unregister(&mci->edac_mci_kobj);
 887         wait_for_completion(&mci->kobj_complete);
 888 }
 889
 890